Explaining The Lockhorns

The lockhorns are leaving the bumper cars at some kind of amusement park, fête or fair.
"How did you manage not to hit a single car?" asks Leroy.

Loretta is annoyed, because the implication is that although she has been unable to intentionally hit others while driving she would normally not have any trouble causing traffic accidents as she is a bad driver.

It's not clear whether this is actually true or not, but Leroy obviously makes this claim with enough regularity that she is easily able to infer such meaning from his statement. Or perhaps she has crashed her car recently and it is this incident to which Leroy refers.

Comic